Metal spraying apparatus



Dc. 14, 1937. T. G. VALENTINE ET AL 2,102,395

METAL SPRAYING APPARATUS Filed May 12, 1934 2 Sheets-Sheet l Gttorneg Dec. 14, 1937. T; e. VALENTINE El AL. 42,102,395

METAL SPRAYING APPARATUS Filed May 12, 1934 2 Sheets-Sheet 2 3nnentors Thomas 6. Va/enf/ne fdward J. Brenna/2 (Ittorneg Patented Dec. 14, 1937 UNITED STATES PATENT OFFICE METAL SPRAYING APPARATUS Application May 12, 1934, Serial No. 725,370

3 Claims.

Our invention relates to a metal spraying apparatus, in particular to an apparatus for melting metal in the form of awire or rod by means of acetylene and oxygen and spraying it by air pressure upon metal surfaces for building up such surfaces, and the objects of our invention are:

First, to provide a nozzle for such spraying apparatus in which there is no leakage of air intothe acetylene or other fuel but the air and fuel are kept separate;

Second, to provide an apparatus of this class with single piece tips and a single locking nut, thus minimizing any chance of leakage; and

Third, to provide an apparatus of this 'class which is simple and economical of construction, durable, eflicient in its action, and which will not readily deteriorate or get out of order.

With these and other objects in view as will appear hereinafter, our invention consists of certain novel features of construction, combination and arrangement of parts and portions as will be hereinafter described in detail and particularly set forth in the appended claims, reference being had to the accompanying drawings and to the characters of reference thereon which form a part of this application, in which:

Figure 1 is a central longitudinal sectional elevational view of our apparatus shown fragmentarily showing some of the parts in elevation to facilitate the illustration; Fig. 2 is a transverse sectional view through 2-2 of Fig. 1 and showing some of the parts and portions in elevation to facilitate the illustration; Fig. 3 is a fragmentary sectional view on an enlarged scale substantially along the line 3-3 of Fig. 1 but showing the member H6 in end elevation; Fig. 4 is a sectional view on an enlarged scale along the line 4-'l of Fig. 1; Fig. 5 is a sectional view along the line 5-5 of Fig. 1, and Fig. 6 is a diagrammatical greatly enlarged longitudinal sectional view of a fragmentary portion of the nozzle of our apparatus.

Similar characters of reference refer to similar parts and portions throughout the several views of the drawings.

The gear box l, flexible shaft 2, wire guides 3 and l, knurled feed roll members and 6, journal members l, springs i3, casings Q, adjusting bolts it, shaft ll, worm gear (12, worm pinion l3, manifold M, hood nozzle member it, nozzle cap it, apparatus support 08, fuel conductor l9, and air conductor 2t, constitute the principal parts and portions of our metal spraying apparatus.

The gear box 9 is hollow and rectangular in shape, as shown best in Figs. 1 and 2 of the drawings. It is provided with a cap Ia on its upper side which is secured thereon by, bolts or otherwise. It is provided on one side with an extended lug Ib which is adapted to receive the jour- 5 nalZa for the flexible shaft 2. This flexible shaft 2 is adapted to extend to any primemover preferably a variable speed motor to which it is connected. At the other end the shaft is extended by means'of a shaft to upon which is mounted a 10 worm pinion I3 which meshes with a worm gear I2, which'worm gear 92 is secured to the shaft I I. This shaft II is journaled in the box I by means of journals Hg. and Mb at its opposite ends.

Mounted on this shaft l I is the fed roll member 5 which has flanges at its sides, as shown best in Fig. 2 of the drawings, and directly connected with this feed roll member 5 is a spur gear 5a both of which are secured to the shaft II and re-' volve therewith. Meshing with this spur gear 5a is another spur gear 60. which is connected with the feed roll member 6, as shown best in Fig. 2

of the drawings. The feed roll member 6 is an unflanged roll and is adapted to roll insideof the flanges of the roll member 5 and their peripherles are spaced to permit the wire or rod W to pass between.

The members 6 and to are mounted on a shaft to which they are secured and the extended .ends' of said shafts are journaled in the journal mem- 3o bers l and these journal members l extend upwardly through the upward side of the box I and are supported in casings 9, the upper ends of which are internally threaded and in which are mounted the adjusting bolts ill which engage the upper ends of springs which are positioned between the adjusting bolts I ll and shoulders on the members Ti, and are adapted to move them downwardly so that the roll member 6 engages the wire or rocl W and provides proper adjustment of the 40 rolls relatively to said wire.

In the one side or" the box l is an opening lb which is provided with a ilmge to surrounding the same. Within this opening lb is supported a manifold M by means of an annular lug lea which extends into said opening and is secured in position by means of set screws through the flange la and against the portion Mia. This manifold extends downwardly and. outwardly from the casing, as shown best in Figs. 1 and 5 of the drawings, and so is provided with air conducting bores Mir which extend. upwardly, as shown best in Fig. 5 of the dravdhgs, and connects with bores Me which extend crosswise near the upper side, thena portion Met which extends downwardly at the opposite side of its axis, Communicating with these bores b, He and I 4d are forwardly extending bores He, shown best by dotted lines in Fig. 1 of the drawings. Communicating with the bore Mb at its lower end in said manifold is an air conductor 10 which extends to the outside of said casing and connects with another air conductor 20a in which is mounted an air valve 20b for regulating the flow of air through the bores in said manifold.

This manifold is also provided with another bore I90. which connects at its upper end with a bore Hf in said manifold and at its lower end connects with a large bore l9b in which is mounted a conductor I9 which isprovided with conductors which extend into separate oxygen and acetylene supply and each is provided with a valve for regulating the flowof the oxygen and acetylene and their relative quantities. Extending forwardly of the main portion-of the manifold II is an externally threaded portion Hg which is adapted to receive the large end of the hood I! and which is threaded for securing thereis centrally positioned. Mounted in this bore M) r is a wire guide 3 which is secured in the manifold and is provided on its extended end with an en- .-with this guide 3 is another guide 4 in the op-.

larged' nozzle portion l6 which is tapered, as shown best in Fig. 1 of the drawings, and provided with a series of small bores lid, as shown best in Figs. 1, 3 and 6 of the drawings. This extended portion of the member I6 abuts rigidly against the extended end of the tapered portion I 4h and is fitted so as to provide a tight fit between the two members. The member 3 is provided with a nut 34: which is adapted to draw the member 3 so that the member l6 rests against the extended end of the member llh. so that there is no chance for leakage between these members l5 and IS. The member I is provided with a plurality of air conducting grooves lib in its outer surface.

. The hood I5 is so arranged over the member h that space is provided the full length'of the hood l5 to permit air from the bores Me to pass in said space to the grooves lib. Mounted over the extended end of the hood I5 is the nozzle cap I! which has a conforming taper internally with the member l6 and is screwthreaded internally adapted to fit on the screw threaded end of the member l5, thus providing a tight fit between the nozzle cap I! and the nozzle member IS. The guide 3 is provided with a central bore adapted to guide the wire W as it moves forwardly to the nozzle. Mounted in alinement posite side of the box I which extends outwardly and serves as a guide for the wire W, it being noted that there is a space where the wire'is not s ded on the interior of the box I where it is supp rted between the rolls 5 and i.

The apparatus is supported upon an arm member I8 secured on the lower face of the manifold M which is provided with a backwardly extending arm for guiding and shifting the apparatus which is mounted on a ball joint "a which may be positioned in any kind of a socket so that the device may be shifted to various Positions by means of the member l8.

The operation of the apparatus is-as follows: Wire of the desired nature is fed through the guides 3 and 4 by means of the rolls 5 and 6 and their operating mechanism at the desired speed. Oxygen and acetylene is conducted through the bores Isa, regulated by the valves in the proper proportions and quantities to the bore Hf, then through the portion 5a and as it passes out of the end of the nozzle 16 is burned and melts the end of the wire. As this wire is melted, air passes through the valve 20b and into the device to its exit is entirely separate from the fuel consisting of oxygen and acetylene, so that there is no leakage from one to the other.

Though we have shown and described a particular construction, combination and arrangement of parts and portions, we do not wish to be limited to this particular construction, com

bination and arrangement but desire to include in the scope of our invention the construction, combination and arrangement substantially as set forth 'in the appended claims.

Having thus described our invention, what we claim as new and desire to secure by Letters Patent is:

1. In a metal spraying apparatus, a gear casing, wire feeding means positioned in said gear casing, a single piece manifold secured in the one side of said gear casing and provided with r a forwardly extending tapered contracted portion extending to near the nozzle end of said spraying apparatus and provided with separate fuel and air conducting conduits in said manifold, a wire guide mounted in said manifold and extending through said contracted extended portion and provided with an integral nozzle on'its one end adapted to seat against the extended end of said contracted portion and its other end extending into said gear casing, a nut on said wire guide in said gear casing for drawing the nozzle end of said wire guide against the extended end of said manifold, a. fuel conduit in said manifold its inner wall formed by the exterior surface of said wire guide, its one end communicating with thefuel conduit insaid manifold and its other end communicating with a plurality of fuel conduits in the nozzle end of said wire guide, air conduits outwardly of said fuel conduits in said nozzle end of said wire guide "extending to near the nozzle end of said spraying apparatus and provided with separate fuel and air conducting conduits in said manifold, a wire guide mounted in said manifold and extending through said contracted extended portion and provided with an integral nozzle on its one end adapted to seat against the extended end of said contracted portion and its other end extending into said gear casing, a nut on said wire guide in saidgear casing for drawing the nozzle end of said wire guide against the extended end of said manifold, a fuel conduit in saidmanifold its inner wall formed by the exterior surface of said wire guide, its one end communicating with the fuel conduit in said manifold and its other end communicating with a plurality of fuel conduits in the nozzle end of said wireguide, air conduits outwardly of said fuel conduits in said nozzle end of said wire guide and communicating with the air conduits in said manifold, a hood secured to said manifold and extending in spaced relation over said extended portion of said manifold forming an air conduit with said extended portion, and an air directing cap secured over the extended end of said hood and in engagement with the outer surface of the nozzle end of said wire guide.

3. In an apparatus of the class described, a'wire guiding member provided with a central bore for guiding a wire, a manifold in which said wireguiding member is mounted, said manifold being conductor, a plurality of air conducting portions outwardly therefrom in said nozzle, a hood se cured to said manifold and a portion spaced therefrom forming an air conductor and a cap secured to the extended end of said hood and extending over said nozzle and extending past the end thereof.

THOMAS G. VALENTINE.

EDWARD J. BRENNAN. 

